CN108053782B - Display panel testing method and signal generator - Google Patents
Display panel testing method and signal generator Download PDFInfo
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- CN108053782B CN108053782B CN201711293784.1A CN201711293784A CN108053782B CN 108053782 B CN108053782 B CN 108053782B CN 201711293784 A CN201711293784 A CN 201711293784A CN 108053782 B CN108053782 B CN 108053782B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
Abstract
The invention provides a display panel test method and a signal generator, wherein a test voltage is loaded in stages in a test, namely, a smaller test voltage is loaded firstly, whether at least one pair of adjacent conductive electrodes of a display panel loaded with the test voltage is short-circuited or not is detected in the process, if the short-circuit does not occur, a larger test voltage is loaded, the signal generator and the display panel to be tested can be prevented from being burnt by the short-circuit, real-time protection can be provided for the display panel, the product yield and the display effect are improved, the reliability and the safety of the signal generator can be improved, and the service life of the signal generator is prolonged.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel testing method and a signal generator.
Background
When an Aging test (Aging) is performed on an OLED (Organic Light-Emitting Diode) panel in a test stage, one signal generator may perform the Aging test on 8 to 10 panels at the same time, and a large voltage signal is loaded during the test, for example: VGL, VGH, VINIT, VDD, VSS, VREF, etc. In the panel binding area, due to abnormal particle residues caused by the process, the adjacent conductive electrodes are short-circuited, and after short circuit, high current instantly generates high temperature of more than 200 ℃, so that a power supply main board of the signal generator is burnt out, the output voltage of the signal generator is abnormal, and the lighting of the panel is abnormal. In addition, the generated high temperature can burn materials at the corner position of the AA area close to the binding area, so that the materials are black, the appearance of the panel is poor, and the organic light-emitting material at the position cannot emit light normally, thereby affecting the display effect. In addition, for the flexible display panel, the film of the flexible display panel is curled due to the high heat generated after short circuit, and the yield of the product is reduced.
Therefore, a method for testing a display panel and a signal generator are needed to solve the above problems.
Disclosure of Invention
The invention provides a display panel testing method and a signal generator aiming at the defects in the prior art, which are used for at least partially solving the problem that adjacent conductive electrodes are easy to generate short circuit when an OLED display panel is tested.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a display panel testing method, which comprises the following steps:
loading a first group of voltages on at least one pair of adjacent conductive electrodes of the display panel and keeping the voltages for a first time, wherein the voltage difference of the first group of voltages is a first voltage difference;
and judging whether the conducting electrode is short-circuited or not, if not, loading a second group of voltages on the conducting electrode after the first time period is finished, wherein the voltage difference of the second group of voltages is a second voltage difference, and the second voltage difference is greater than the first voltage difference.
Further, the display panel testing method further includes: and if the short circuit occurs, stopping loading the first group of voltages, and no longer loading the second group of voltages on the conductive electrode.
Preferably, the first voltage difference is 8-10 volts.
Preferably, the first time period is 300-.
Preferably, the applying a first voltage to at least one pair of adjacent conductive electrodes of the display panel includes:
a first voltage is applied to the plurality of display panels simultaneously, wherein a first set of voltages is applied to at least one pair of adjacent conductive electrodes of each display panel.
The invention also provides a signal generator, comprising a control unit and a signal generating unit, wherein the signal generating unit comprises at least one group of output ends for outputting a group of voltage signals from the output ends,
the control unit is used for indicating the signal generation unit to output at least one group of first group of voltage signals for a preset first time so that a tester can judge whether at least one pair of adjacent conductive electrodes of the display panel loaded with the first group of voltages is short-circuited or not, wherein the voltage difference of the first group of voltages is a first voltage difference; when the first time length is up and a control command is not received, the signal generation unit is instructed to output at least one group of second group voltages, wherein the voltage difference of the second group voltages is a second voltage difference, and the second voltage difference is larger than the first voltage difference; the control command is sent when the conductive electrodes loaded with the first group of voltages are short-circuited.
Further, the control unit is further configured to, when receiving the control instruction, stop loading the first set of voltages, and no longer instruct the signal generation unit to output the second set of voltages.
Further, the signal generating unit further comprises an input end for receiving a feedback signal from the input end, wherein the feedback signal is sent by at least one pair of adjacent conductive electrodes of the display panel after receiving the first group of voltage signals;
the signal generator further comprises a protection unit, wherein the protection unit is positioned between the input end of the signal generation unit and at least one pair of adjacent conductive electrodes of the display panel and is used for cutting off the connection between the input end of the signal generator and the conductive electrodes when current is overloaded.
Preferably, the protection unit is an overcurrent protection sheet.
Preferably, the protection unit is disposed on a main board of the signal generator.
Preferably, the output ends of the signal generating units are in multiple groups, and the input ends of the signal generating units and the protection units are in multiple groups, and the number of the input ends of the signal generating units and the number of the protection units is the same as that of the groups of the output ends of the signal generating units;
each protection unit is respectively arranged between each input end of the signal generation unit and at least one pair of adjacent conductive electrodes of each display panel.
The invention can realize the following beneficial effects:
according to the display panel testing method and the signal generator, the testing voltage is loaded in stages in the test, namely, the smaller testing voltage is loaded firstly, whether at least one pair of adjacent conductive electrodes of the display panel loaded with the testing voltage is short-circuited or not is detected in the process, if the short circuit does not occur, the larger testing voltage is loaded, the signal generator and the display panel to be tested can be prevented from being burnt by the short circuit, real-time protection can be provided for the display panel, the yield and the display effect of products are improved, the reliability and the safety of the signal generator can be improved, and the service life of the signal generator is prolonged.
Drawings
FIG. 1 is a schematic flow chart of a method for testing a display panel according to the present invention;
fig. 2 is a block diagram of a signal generator according to the present invention.
Illustration of the drawings:
21. control unit 22, signal generation unit 23, output terminal
24. Input terminal 25, PPTC 231, first output terminal
232. Second output terminal
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a method for testing a display panel, which is used for detecting the service life of the display panel (namely aging test) in the test stage of the display panel, and the method utilizes a signal generator to load voltage to the display panel to be tested so as to detect the service life of the display panel to be tested, and concretely, as shown in figure 1, the method comprises the following steps:
Specifically, at least one group of output ends of the signal generator is connected with at least one pair of adjacent conductive electrodes of the display panel to be tested, and the conductive electrodes may be conductive electrodes in a binding region of the display panel to be tested. Taking the example that the signal generator includes a set of output terminals, one output terminal of the set of output terminals is electrically connected to one conductive electrode, and the other output terminal is electrically connected to another adjacent conductive electrode. The group of output ends of the control signal generator outputs a first group of voltages, and the voltage difference of the first group of voltages is a first voltage difference, namely the voltage difference output by the two output ends is the first voltage difference.
Preferably, the first voltage difference is 8-10 volts. The first duration is 300-500 nanoseconds.
And 102, judging whether the conductive electrode is short-circuited, if not, executing a step 103, otherwise, executing a step 104.
Specifically, in the process of loading the first group of voltages, whether a pair of adjacent conductive electrodes loaded with the first group of voltages is short-circuited is detected, if the pair of adjacent conductive electrodes loaded with the first group of voltages is not short-circuited, the signal generator loads a second group of voltages to the conductive electrodes after the first time period is over (i.e., step 103 is executed), where a voltage difference of the second group of voltages is a second voltage difference, and the second voltage difference is greater than the first voltage difference.
If a short circuit occurs, because the first set of voltage differences is smaller than the second set of voltage differences, and the loading of the smaller voltage differences already causes a short circuit of the adjacent pair of conducting electrodes, the test is performed without further loading of the larger voltage differences, and therefore, the loading of the first set of voltages is stopped, and the second set of voltages is no longer loaded onto the conducting electrodes (i.e., step 104 is performed), thereby terminating the test.
And 103, loading a second group of voltages on the conductive electrodes after the first time period is finished.
Specifically, whether the conductive electrode loaded with the first group of voltages is short-circuited or not can be judged by the detection device or manually judged by a tester. If the detection device judges that the conductive electrode is not short-circuited, the detection device cannot send a control signal to the signal controller, the signal generator automatically loads a second group of voltages to the conductive electrode after the first time period is finished, and the voltage difference of the second group of voltages (namely the second voltage difference) is larger than the first voltage difference.
Preferably, a second time period can be preset in the signal generator, the signal generator can start timing the second time period after the first time period is ended, and whether the conducting electrode is short-circuited or not can be judged by a tester in the time period of the second time period. If the short circuit does not occur, the tester cannot send a control signal to the signal controller, then the signal generator automatically loads a second group of voltages to the conductive electrode after the second time length is reached, and the voltage difference of the second group of voltages (namely the second voltage difference) is greater than the first voltage difference.
Preferably, the second set of voltage differences may be 15-20 volts.
And 104, stopping loading the first group of voltages, and no longer loading the second group of voltages on the conductive electrode.
Specifically, whether the detection device or the tester judges whether the short circuit occurs or not, if the short circuit occurs in the process of loading the first group of voltages, the detection device or the tester sends a control instruction to the signal generator to control the signal generator to stop loading the first group of voltages and not to continue loading the second group of voltages. So far, the test of the display panel is finished, and the test of the display panel fails.
It can be seen from step 101-104 that, by loading the test voltage in stages, that is, loading a smaller test voltage first, and detecting whether at least one pair of adjacent conductive electrodes of the display panel loaded with the test voltage is short-circuited in the process, if the short-circuit does not occur, loading a larger test voltage, the signal generator and the display panel to be tested can be prevented from being burned down due to the short-circuit, so that not only can real-time protection be provided for the display panel, and the yield and the display effect of the product be improved, but also the reliability and the safety of the signal generator can be improved, and the service life of the signal generator can be prolonged.
In addition, the display panel testing method of the present invention may also be a method for simultaneously testing a plurality of display panels, in which the step of applying the first voltage to at least one pair of adjacent conductive electrodes of the display panels (i.e., step 101) includes: and loading a first voltage to the plurality of display surfaces simultaneously, namely loading a first group of voltages to at least one pair of adjacent conductive electrodes of each display panel plate simultaneously, so that the test efficiency of the display panel is improved.
The present invention further provides a signal generator, as shown in fig. 2, the signal generator includes a control unit 21 and a signal generating unit 22, the signal generating unit 22 includes at least one set of output terminals 23, and is used for outputting a set of voltage signals from the output terminals 23. In the embodiment of the present invention, the signal generator includes a set of output terminals 23 as an example, as shown in fig. 2, the set of output terminals 23 includes a first output terminal 231 and a second output terminal 232, and the first output terminal 231 and the second output terminal 232 are capable of outputting voltage signals with different magnitudes.
The control unit 21 is configured to instruct the signal generating unit 22 to output at least one group of first group voltage signals for a preset first duration, so that a tester determines whether a short circuit occurs between at least one pair of adjacent conductive electrodes of the display panel loaded with the first group voltage, where a voltage difference of the first group voltage is a first voltage difference; and when the first time period is reached and the control command is not received, the instruction signal generating unit 22 outputs at least one set of second group voltages, wherein the voltage difference of the second group voltages is a second voltage difference, and the second voltage difference is greater than the first voltage difference.
The control command is sent when the conductive electrode loaded with the first group of voltages is short-circuited, and may be sent by a detection device for detecting the short-circuit or sent by a tester.
Preferably, the first voltage difference is 8-10 volts.
Preferably, the first time period is 300-.
According to the signal generator provided by the invention, the test voltage is loaded in stages, namely, a smaller test voltage is loaded firstly, whether short circuit occurs in at least one pair of adjacent conductive electrodes of the display panel loaded with the test voltage is detected in the process, if the short circuit does not occur, a larger test voltage is loaded, the signal generator and the display panel to be tested can be prevented from being burnt by the short circuit, real-time protection can be provided for the display panel, the yield and the display effect of products are improved, the reliability and the safety of the signal generator can be improved, and the service life of the signal generator is prolonged.
Further, the control unit 21 is further configured to stop loading the first set of voltages when receiving the control instruction, and no longer instruct the signal generation unit 22 to output the second set of voltages.
Further, as shown in fig. 2, the signal generator further comprises an input terminal 24 for receiving a feedback signal from the input terminal 24, wherein the feedback signal is transmitted by at least one pair of adjacent conductive electrodes of the display panel after receiving the first set of voltage signals.
The signal generator may further comprise a protection unit 25, the protection unit 25 being located between the input terminal 24 of the signal generating unit 22 and at least one pair of adjacent conductive electrodes of the display panel for disconnecting the input terminal 24 of the signal generator from the conductive electrodes in case of a current overload.
Preferably, the protection unit 25 may be an overcurrent protection sheet (PPTC). The PPTC exhibits a low resistance in normal current conditions, ranging from about a few milli-ohms (m Ω) to a few ohms (Ω), and upon excessive current (i.e., an overcurrent fault), the resistance within the PPTC rises sharply, thereby protecting the back-end devices. The PPTC has excellent restorability, and after an overcurrent fault is eliminated, the resistor in the PPTC can automatically restore to a low-resistance state, so that a circuit is automatically restored to a conducting state.
Preferably, the protection unit 25 may be provided on a main board of the signal generator.
In order to improve the efficiency of the test, it is preferable that the output terminals 23 of the signal generating unit 22 are provided in plural sets, and the input terminals 24 and the protection units 25 of the signal generating unit 22 are provided in plural sets, and the number of the sets is the same as that of the output terminals 23 of the signal generating unit 22. Each protection unit 25 is disposed between each input terminal 24 of the signal generation unit 22 and at least one pair of adjacent conductive electrodes of each display panel.
Specifically, the input end 24 and the group of output ends 23 of the signal generating unit 22 may correspond to a display panel to be tested, and a protection unit 25 is connected between each display panel to be tested and the signal generator, so that when each display panel to be tested is tested at the same time, each protection unit 25 may perform overcurrent protection on the signal generator respectively, thereby further improving the safety and reliability of the signal generator.
The multiple input ends 24 and the multiple output ends 23 of the signal generating unit 22 may also correspond to different conductive electrodes of a display panel to be tested, and a protection unit 25 is connected between each display panel to be tested and each input end 24 of the signal generator, so that when the multiple conductive electrodes of the display panel to be tested are tested simultaneously, each protection unit 25 may perform overcurrent protection on the different input ends 24 of the signal generator, thereby further improving the safety and reliability of the signal generator.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (11)
1. A display panel testing method is characterized by comprising the following steps:
loading a first group of voltages on at least one pair of adjacent conductive electrodes of the display panel and keeping the voltages for a first time, wherein the voltage difference of the first group of voltages is a first voltage difference;
judging whether the conducting electrode is short-circuited or not, if the conducting electrode is not short-circuited, loading a second group of voltages to the conducting electrode after the first time period is ended, wherein the voltage difference of the second group of voltages is a second voltage difference, and the second voltage difference is greater than the first voltage difference;
the non-occurrence of short circuit includes: when the first time length is up and a control instruction is not received, the control instruction is sent by detection equipment or a testing person.
2. The method of claim 1, wherein the method further comprises: and if the short circuit occurs, stopping loading the first group of voltages, and no longer loading the second group of voltages on the conductive electrode.
3. The method of claim 1, wherein the first voltage difference is 8-10 volts.
4. The method of claim 1, wherein the first duration is 300 and 500 nanoseconds.
5. The method of claim 1, wherein applying a first voltage to at least one pair of adjacent conductive electrodes of the display panel comprises:
a first voltage is applied to the plurality of display panels simultaneously, wherein a first set of voltages is applied to at least one pair of adjacent conductive electrodes of each display panel.
6. A signal generator comprising a control unit and a signal generating unit, said signal generating unit comprising at least one set of output terminals for outputting a set of voltage signals from said output terminals,
the control unit is used for indicating the signal generation unit to output at least one group of first group of voltage signals for a preset first time so that a tester can judge whether at least one pair of adjacent conductive electrodes of the display panel loaded with the first group of voltages is short-circuited or not, wherein the voltage difference of the first group of voltages is a first voltage difference; when the first time length is up and a control command is not received, the signal generation unit is instructed to output at least one group of second group voltages, wherein the voltage difference of the second group voltages is a second voltage difference, and the second voltage difference is larger than the first voltage difference; the control command is sent by detection equipment or a tester, and is sent when the conductive electrode loaded with the first group of voltages is short-circuited.
7. The signal generator of claim 6, wherein the control unit is further configured to stop loading the first set of voltages when the control instruction is received and no longer instruct the signal generation unit to output the second set of voltages.
8. The signal generator of claim 6, wherein the signal generating unit further comprises an input for receiving a feedback signal from the input, the feedback signal being transmitted by at least one pair of adjacent conductive electrodes of the display panel upon receiving the first set of voltage signals;
the signal generator further comprises a protection unit, wherein the protection unit is positioned between the input end of the signal generation unit and at least one pair of adjacent conductive electrodes of the display panel and is used for cutting off the connection between the input end of the signal generator and the conductive electrodes when current is overloaded.
9. The signal generator of claim 8, wherein the protection unit is an overcurrent protection sheet.
10. The signal generator of claim 8, wherein the protection unit is disposed on a main board of the signal generator.
11. The signal generator according to any one of claims 8 to 10, wherein the output terminals of the signal generating unit are in a plurality of groups, and the input terminals of the signal generating unit and the protection unit are in a plurality of groups, which are the same as the number of groups of the output terminals of the signal generating unit;
each protection unit is respectively arranged between each input end of the signal generation unit and at least one pair of adjacent conductive electrodes of each display panel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711293784.1A CN108053782B (en) | 2017-12-08 | 2017-12-08 | Display panel testing method and signal generator |
| US16/213,210 US10510278B2 (en) | 2017-12-08 | 2018-12-07 | Signal loading method and signal generator |
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| CN201711293784.1A CN108053782B (en) | 2017-12-08 | 2017-12-08 | Display panel testing method and signal generator |
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| CN108648672B (en) * | 2018-07-03 | 2021-08-31 | 京东方科技集团股份有限公司 | Probe module and lighting test system |
| CN109215548B (en) * | 2018-11-08 | 2020-09-08 | 惠科股份有限公司 | Circuit for aging display panel and display panel |
| CN111579903A (en) * | 2020-05-18 | 2020-08-25 | 格力电器（合肥）有限公司 | Display module testing tool and testing method |
| US11508273B2 (en) * | 2020-11-12 | 2022-11-22 | Synaptics Incorporated | Built-in test of a display driver |
| CN114286037B (en) * | 2022-03-04 | 2022-06-07 | 武汉精立电子技术有限公司 | Video image signal generator and aging test device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297622A (en) * | 2014-10-30 | 2015-01-21 | 京东方科技集团股份有限公司 | Method and device for detecting defects of display panel |
| CN104616614A (en) * | 2014-11-28 | 2015-05-13 | 合肥京东方光电科技有限公司 | Power-on method and device and detection method and device of display module |
| CN105093593A (en) * | 2015-09-11 | 2015-11-25 | 京东方科技集团股份有限公司 | Display substrate and testing method and display device thereof |
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|---|---|---|---|---|
| US20020158609A1 (en) * | 2001-04-25 | 2002-10-31 | Lavington Robert H. | Battery charger protection circuit |
| EP2739119B1 (en) * | 2012-11-30 | 2015-08-19 | Dialog Semiconductor GmbH | Short circuit detection for lighting circuits |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297622A (en) * | 2014-10-30 | 2015-01-21 | 京东方科技集团股份有限公司 | Method and device for detecting defects of display panel |
| CN104616614A (en) * | 2014-11-28 | 2015-05-13 | 合肥京东方光电科技有限公司 | Power-on method and device and detection method and device of display module |
| CN105093593A (en) * | 2015-09-11 | 2015-11-25 | 京东方科技集团股份有限公司 | Display substrate and testing method and display device thereof |
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| CN108053782A (en) | 2018-05-18 |
| US10510278B2 (en) | 2019-12-17 |
| US20190180662A1 (en) | 2019-06-13 |
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